Doesn't seem to handle this correctly

[freeformz]

$ go test -v ./v2/sink/... 2>&1
# github.com/heroku/metaas/v2/sink/cassandra
import cycle not allowed in test
package github.com/heroku/metaas/v2/sink/cassandra (test)
	imports github.com/heroku/metaas/v2/sink
	imports github.com/heroku/metaas/v2/sink/cassandra

FAIL	github.com/heroku/metaas/v2/sink/cassandra [setup failed]
?   	github.com/heroku/metaas/v2/sink	[no test files]
?   	github.com/heroku/metaas/v2/sink/mock	[no test files]
$ echo $?
1

vs

$ go test -v ./v2/sink/... 2>&1 | patter
TAP version 13
# imports github.com/heroku/metaas/v2/sink
# imports github.com/heroku/metaas/v2/sink/cassandra
1..0 # skip because no tests were run.%                                                                                                                                             $ echo $?
0